I just see that &amp;nbsp; or &nbsp; don't work in qt internationalization system :-(

I also revisited the pages on Wikipedia about that:
http://fr.wikipedia.org/wiki/Ponctuation#Signes_de_ponctuation_occidentaux
http://fr.wikipedia.org/wiki/Espace_typographique#Langage_HTML
Than the right char is `&#160;` but i think that a simple space is also acceptable :-)